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Corn Starch Derived Capacitive Carbon Prepared by One-Step K<sub>2</sub>CO<sub>3</sub> Carbonization for Supercapacitors
Hefei No. 8 High School, Hefei, China
Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
- 1 Hefei No. 8 High School, Hefei, China
- 2 Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
Journal of Materials Science and Chemical Engineering·Volume 11 (2023)·Pages 1–7·Published 12 October 2023·DOI10.4236/msce.2023.1110001
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Abstract
High-performance carbonaceous electrode materials for supercapacitors were synthesized by subjecting corn starch to a simple molten salt activation process with K 2 CO 3 at a temperature of 850 ˚ C. The resulting carbon material, obtained after activating for 1 hour, displayed excellent capacitive properties due to the synergistic effects of its porous structure. Utilizing these electrodes, the supercapacitor exhibited a high discharge capacitance (248 F g − 1 at 1 A g − 1 ), which is 2.4 times higher than that of activated carbon without K 2 CO 3 activation. The enhancement in electrical performance was analyzed through SEM and XRD analysis, revealing that the porous and disordered structure provides a greater number of charge storage sites, resulting in improved capacitive performance.
KeywordsActivated CarbonPorous StructureCorn StarchSupercapacitors
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